Cannnot access the Internet using tcp/udp from RG

[Tri Trinh]

Hello!

I'm installing seba-in-a-box with a fabric switch and from rg I can ping to the Internet but I cannot connect to the Internet using any other protocol than icmp. I have monitored the bng's output port and see the tcp and udp packet have been natted and transferred to this output port but don't know why there is no reply. Is there any way that the tcp and udp protocol packets are cut off some fields in the header?

Following is some ping and monitoring log

Thank you very much

Tri

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=117 time=42.1 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=117 time=50.6 ms

root@rg0-0-69cdbf6b58-xnr5p:/# ping vnpt.vn

monitor at input port of bng

root@bng:~# tcpdump -ni enp1f0.222.111
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on enp1f0.222.111, link-type EN10MB (Ethernet), capture size 262144 bytes
16:44:47.855897 IP 172.18.0.61.53971 > 8.8.4.4.53: 56190+ A? vnpt.vn. (25)
16:44:52.870465 ARP, Request who-has 172.18.0.10 tell 172.18.0.61, length 42
16:44:52.870494 ARP, Reply 172.18.0.10 is-at 00:e0:ed:36:e1:e6, length 28
16:45:14.157754 IP 172.18.0.61.49845 > 8.8.4.4.53: 19004+ A? vnpt.vn. (25)
16:45:19.160558 IP 172.18.0.61.49845 > 8.8.4.4.53: 19004+ A? vnpt.vn. (25)
16:45:24.168004 IP 172.18.0.61.59458 > 8.8.4.4.53: 13645+ A? vnpt.vn. (25)
16:45:29.169351 IP 172.18.0.61.59458 > 8.8.4.4.53: 13645+ A? vnpt.vn. (25)
16:45:34.177095 ARP, Request who-has 172.18.0.10 tell 172.18.0.61, length 42
16:45:34.177125 ARP, Reply 172.18.0.10 is-at 00:e0:ed:36:e1:e6, length 28

monitor at output port of ng